Annealing fubnaoe



(No Model.) 3 Sheets-Sheet 1'.

. W. N EHRING; ANNEALING FURNACE. N0. 247,943. Patented Odt. 4,1881.

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f J UNITED- STATES P TENT OFFICE.

WILLIAM NEHRING, OF OIN CINNATL OHIO, ASSIGNOR TO THE QUEEN OlTYMALLEABLE IRON COMPANY, (LIMITED,) OF SAME PLACE.

ANNEALlNQ-FURNACE.

SPECIFICATION forming part of Letters.Pa.tent No. 247,943, dated October4, 1881.

' Application filed Jnly16, 188 1. momenta.)

To all whom it may concern:

Be it known that I, WILLIAM NEHRING, of Cincinnati, Hamilton county,Ohio, have invented a new and useful Improvementin An--healing-Furnaces, of which the following a specification.

My invention is more particularly designed for the production ofmalleable cast-iron.

It is well known that thelabo'r of putting the articles to he annealedinto and getting them out of the furnace in the customary plan isattended with much delay and difficulty, and that, while within thefurnace, some of the larger articles are insufficiently annealed, whileother articles, becoming overheated, are liable to sag and to becomewelded together, and,besides inj uries received from these causes, arewith djfliculty removed from the furnace.

With the object of economizing both material and labor, and withalproducing better work, I'have so constructed my improved furnace that afull charge of articles to be annealed can be inserted. simultaneously,and,

when in the judgment of the furnace-man sufficiently annealed, can be aspromptly removed.- To accomplish this I have constructed the bottom andfrontof the oven or furnace on a strong iron frame-work mounted onwheels and movable toward and from the stationary portions along arail-tracklikea truck. Except for the largest articles, the objects tobe annealed are placed in crucibles or boxes, which boxes are stacked onthe floor of said movable portion, which portion is then pushed into thefurnace proper, of which thefloor of the truck then eonstitutes thebottom, and of which the wall at one end of the truck constitutes theclosed door. This having been done, the joint between the fixed andmovable portions is suffi-' eiently closed by means of brick.

In order to regulateanddirect the heat to dilferent parts of the oven, Iconstruct my flues in several branches, one or more of which are capableof being wholly or partially closed at discretion of the attendant.

1n the accompanying drawings, Figure 1 is a longitudinal fore-and-aftsection of an annealing furnace or oven embodying my invention. Fig. 2is a section 011 the line as m, Fig. 1. F1g. 3 isa frontelevation withthe tluek in -position. Fig. 4 is a section on the line 3 Fig. 2. Fig. 5is a side elevation of my truck.

Fig. 6 is a partially sectioned elevation of a modification of myfurnace, designed for the larger class of articles. Fig. 7 is asectionon the line 2 z.

A represents an arched, vault of masonry,

open at both ends. This vault is dividedinto said.

The wall 13 has a line or uptake, I, which communicates at or near itslower part on the front side with a series of flues, J, that communicatewith like flues, K, in the bed or floor 1 of the truck L. The uptake Idischarges by flue N into a suitable chimney. (Not shown.) The fines K,near their front ends, communicate by short downtakesMwith the saidlarger compartment, which compartment, in conjunction with saidtruck,constitutes m yoven proper, Z. The fiues K extend preferably tothe extreme front of the truck, so as to form open in gs K, in themanner represented, and eachis supplied with a movable plug or stopper,Q, which, being pushed rearward or drawn forward, serves to close oropen the respective downtakes, and thus to regulate and direct the heattoparticular parts.

Rising vertically from the front edge of the truckfloor is a wall, P,which, when the truck, 0

is driven home, serves as the front wall of my oven, and also does dutyas its door. Ventilators or cooling-inlets Q in the truckwall areclosable by means of doors R, by partially or wholly opening of whichair may be 5 admitted, either to assist combustion or to aid inregulating the heat, either generally or 10- l rally, as may be deemednecessary.

The doors R are preferably provided with mica windows S, to enableinspection from time to time of the interior of the oven.

T are the truck-wheels, resting upon a track or tramway, U.

V is an oiiset in the wall B, to receive the luting-briclis.

The dimensions of the truckwall are preferablyjust sufficiently lessthan the interior of vault A to permit the introduction of luting bricksor tiles W.

X represents a cast-iron slab, upon which are stacked the crucibles orboxes Y, which are charged with the articles to be annealed.

In the modification shown in Figs. (5 and 7 there are two parti-walls, BP. The smoke enters downtakes M at mid-length of truckfloor, thenceescaping through two sets of fines, KK, to the two uptakes l I, and thetruck and tramway are so disposed as to give a motion in or out parallelwith, instead of at right angles to, the partiwaIls.

The modification, Figs. 6 and 7, although capable of use with crucibles,is chiefly de-i signed for articles of large dimensions, with whichcrucibles are not commonly employed.

Having thus described my invention, the following is what I claim as newtherein and desire to secure by Letters Patent:

1. The combination, in an annealing'furmice, of the fire-place O,theparti-Wall, with its uptake I, and the truck L, with its wall P andfines M and K.

2. The combination, with oven Z, whose floor and front are componentparts, of a separable truck, L, the orifices Q), and K in said front andorifices M in said fioor communicating with oven and with floor-finesK,respectively, the said floor-fines discharging into fines J, leadingto uptakes I within fire-bridge B, said orifices being provided withregulating doors or stoppers, the whole being arranged and op eratedsubstantially as set forth.

In testimony of which invention I hereunt) set my hand.

WILLIAM NEHRING.

\Vitznesses:

GEO. KNIGHT, SAML. S. 'IARPENT'ER.

